Impact Electrification of High Purity Water on Insulating Solids

本文介绍了纯水冲击带电的测量结果，并对绝缘固体搅拌面的带电机理进行了讨论。测量了绝缘固体表面的充电电位分布与水的电阻率（几KOMEGA cm -10 MOMEGA cm）、固体样品的厚度（50 μ m -8 mm）和水的冲击速度（4 - 12 m/s）的关系。研究了聚四氟乙烯（PTFE）、聚乙烯（PE）、硅橡胶和聚异戊二烯（cis-14-polyisopropene）等绝缘固体表面的带电电位，发现随着水的电导率的降低、水的冲击速度的增加和固体样品厚度的增加，绝缘固体表面的带电电位增加。当撞击速度为零时，荷电电位值较大。也就是说，水的冲击带电包括由于水的冲击能量引起的充电和接触充电。特别是接触起电对冲击起电的影响最大。认为这些现象与水分子在绝缘固体表面的吸附有关。

This report presents the results of the measurement of the impact electrification of the purity water and the discussion of the charging mechanism of the insulating solid stirface. The charging potential distribution of the insulating solid surface has been measured as a function of the resiscivity of water (several KOMEGA cm - 10MOMEGA cm), the thickness of solid sample (50mu m - 8mm), and the impact velocity of water (4 - 12m/s). Insulating solid used for this investigation are PTFE(polytetrafluoroethylene), PE(polyetliylene), silicone rubber and cis-14-polyisoprene.It is found that the charging potential of the insulating solid surface increases with decreasing the conductivity of water, increasing the impact velocity of water or increasing the thickness of solid sample. It is also found that the charging potential shows considerable value when the impact velocity is zero. That is, the impact electrification of water consists of the charging due to the impact energy of water and the contact charging. Particularly, the impact electrification is affected the most of the contact electrification. It is considered that these phenomena is related to the admolecular of water on the insulating solid surface.